Red point: darker
Green point: lighter
Blue point: equal
Darker point: 1
Darker reflectance: E
Darker method: C
Equal score: 0.15754761919
Darker point darker score: not computed since the judgement is "E"
darker: 1 (eq: False, dd: True), confidence: 1, worker: AX720MTAR52TX
darker: E (eq: True, dd: None), confidence: 1, worker: A20CM8GXU53GUY
darker: 1 (eq: False, dd: True), confidence: 2, worker: ANVXAMUEBGV8N
darker: E (eq: True, dd: None), confidence: 0, worker: AIKBREX7SEPXE
darker: 1 (eq: False, dd: True), confidence: 2, worker: A2RUHINET2E1C5 (marked invalid)
darker: E (eq: True, dd: None), confidence: 0, worker: A90QPQO48C6RX
(0: guessing, 1: probably, 2: definitely)